Re: R-407C and Coil Capacity
This makes for interesting reading and seems to answer your question. http://www.cnpam.edu.my/ICRAMME2005/...rs/PP/PP30.pdf
Re: R-407C and Coil Capacity
"However, experimental data in association with this most important refrigerant substitute for R-22 are limited at the present time." and the report is dated May 2005. I suppose that is probably why Colmac hasn't added it to their software yet.
Thanks very much.
Re: R-407C and Coil Capacity
R407c has been used in Europe since late 90s.
Performance is 7% lower than R22 at the same working conditions, and SH, SC must be kept higher to prevent distillation of blend.
Re: R-407C and Coil Capacity
Ciat have some research on this subject.They did experiment with same chillers and diferent refrigerants.The R 407c have biger power consuption and small decrease in heat power.
But use R22 calculator and calculate 5% decrease in heat power.
Renato
Re: R-407C and Coil Capacity
I think some manufacturers use either the dew or bubble point as design saturation temperature which can give capacitys higher or lower than R22. In practical terms you must use the bubble point & factor in 10k subcooling to ensure a good liquid seal in condensor. If not you'll get a breakdown of the refrigerant called fractionisation. My best advice is to avoid R407c as most manfacturers are switching to R134a on liquid chillers or other more stable refrigerants.